| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
The methods of creating river flow diversity were investigated experimentally and numerically by using large roughnesses such as boulders and groins as an impact in straightened small and medium-sized rivers. Flow structures around the roughnesses were clarified when large roughness elements were placed in a straight open channel with various patterns. The river-bed configurations created by such large roughnesses were made clear and evaluated in the sense of river diversity and flood effect. Furthermore, focusing on spur dike as the large roughness, measures to reduce local scour and to control flow structure and sediment deposition in a riverside concavity were investigated. Then, the useful knowledge was obtained for creating diversified and ecologically rich river course.
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